Working effectively with OpenShift
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The document provides an overview of OpenShift, a Platform as a Service (PaaS) provider. It discusses that OpenShift offers developers a self-service standard development environment, automated application deployment and provisioning, version control and continuous integration capabilities. It also provides tips for using OpenShift, including setting up auto-complete for commands, working in teams, tracking deployments, and enabling continuous integration.
Working effectively with OpenShift
- 1. Who Am I? • Working at Xebia • Previously worked with Red Hat as OpenShift Evangelist • Software developer with experience in Java, Python, and JavaScript • Written a book on OpenShift http://www.amazon.com/OpenShift-Cookbook-Shekhar- Gulati/dp/1783981202/ • Active Blogger http://whyjava.wordpress.com/ • Twitter: shekhargulati © Xebia IT Architects Pvt Ltd. 2014. Confidential: Not for Reproduction & Distribution. www.xebia.in
- 2. How many of you have worked with any PaaS? © Xebia IT Architects Pvt Ltd. 2014. Confidential: Not for Reproduction & Distribution. www.xebia.in
- 3. © Xebia IT Architects Pvt Ltd. 2014. Confidential: Not for Reproduction & Distribution. www.xebia.in
- 4. © Xebia IT Architects Pvt Ltd. 2014. Confidential: Not for Reproduction & Distribution. www.xebia.in
- 5. PaaS is the most developer friendly cloud delivery model © Xebia IT Architects Pvt Ltd. 2014. Confidential: Not for Reproduction & Distribution. www.xebia.in
- 6. There are many PaaS providers • OpenShift • Cloud Foundry • Google App Engine • Heroku • Jelastic © Xebia IT Architects Pvt Ltd. 2014. Confidential: Not for Reproduction & Distribution. www.xebia.in
- 7. © Xebia IT Architects Pvt Ltd. 2014. Confidential: Not for Reproduction & Distribution. www.xebia.in
- 8. What OpenShift Offers © Xebia IT Architects Pvt Ltd. 2014. Confidential: Not for Reproduction & Distribution. www.xebia.in
- 9. What’s in the box? © Xebia IT Architects Pvt Ltd. 2014. Confidential: Not for Reproduction & Distribution. www.xebia.in
- 10. OpenShift in Action • Create an account on OpenShift Online • It gives you 3 gears(like servers) – each 512 MB RAM and 1 GB disk • Choose a client • Setup your account • Create an application © Xebia IT Architects Pvt Ltd. 2014. Confidential: Not for Reproduction & Distribution. www.xebia.in
- 11. Flavors of OpenShift © Xebia IT Architects Pvt Ltd. 2014. Confidential: Not for Reproduction & Distribution. www.xebia.in
- 12. What makes OpenShift Different? © Xebia IT Architects Pvt Ltd. 2014. Confidential: Not for Reproduction & Distribution. www.xebia.in
- 13. OpenShift Terminology • Node: A virtual or physical machine that acts as container host. It provides a multi tenant environment for end user applications. • Gear: A gear is a secure container that runs inside a node and host end user applications. It is constrained by RAM, CPU, and Disk space. • Cartridge: Adds functionality to a gear like programming language, database, etc. • Broker: All clients interact with REST API exposed by broker. It is responsible for all application management activities. © Xebia IT Architects Pvt Ltd. 2014. Confidential: Not for Reproduction & Distribution. www.xebia.in
- 14. What happens behind the scenes? • Client makes a REST request • Broker receives the request. It parse the request and pushes a message on the queue • Broker and node talk with each other using ActiveMQ • Node with capacity will reply back saying it can host the application • A gear will be provisioned with the application stack • A private Git repository will be created for your application • Your application DNS will be propagated to the outside world • Application will be cloned on your local machine © Xebia IT Architects Pvt Ltd. 2014. Confidential: Not for Reproduction & Distribution. www.xebia.in
- 15. PaaS and DevOps Practices • Self service of standard development environment • Provisioning of the application stack • Automated deployment • Version control and continuous integration • Automated testing • Improved collaboration • Monitor everything © Xebia IT Architects Pvt Ltd. 2014. Confidential: Not for Reproduction & Distribution. www.xebia.in
- 16. OpenShift Tips and Tricks © Xebia IT Architects Pvt Ltd. 2014. Confidential: Not for Reproduction & Distribution. www.xebia.in
- 17. RHC AutoComplete Run the rhc setup --autocomplete command Add ~/.openshift/bash_autocomplete to your .bashrc or .bash_profile file. © Xebia IT Architects Pvt Ltd. 2014. Confidential: Not for Reproduction & Distribution. www.xebia.in
- 18. Working as a Team Create a team using rhc create-team command Add members to the team using rhc add-member command A member can have viewer, editor, or admin role You can also add members to different domains © Xebia IT Architects Pvt Ltd. 2014. Confidential: Not for Reproduction & Distribution. www.xebia.in
- 19. Tracking and rollback deployments Configure the application to keep multiple deployments rhc configure-app --keep-deployments 5 Make a change to you application and push it to application gear You can view list of deployments using rhc deployment-list command To rollback a deployment use rhc deployment-activate command. © Xebia IT Architects Pvt Ltd. 2014. Confidential: Not for Reproduction & Distribution. www.xebia.in
- 20. Doing Manual Deployments Configure the application to disable auto deployments $ rhc configure-app –no-auto-deploy Make changes and push to application gear. Changes will not be deployed. To manually deploy the changes run the $ rhc deploy –ref master © Xebia IT Architects Pvt Ltd. 2014. Confidential: Not for Reproduction & Distribution. www.xebia.in
- 21. OpenShift Binary Deployments • Create an OpenShift application $ rhc create-app app jbosseap --no-git • Configure the app for binary deployment $ rhc configure-app –no-auto-deploy –deployment-type © Xebia IT Architects Pvt Ltd. 2014. Confidential: Not for Reproduction & Distribution. www.xebia.in binary • Create a directory structure $ mkdir –p build-dependencies/.m2 repo/deployments dependencies/jbosseap/deployments • Create a tar file $ tar -czvf --app.tar.gz ./ • Deploy the application $ rhc deploy –ref app.tar.gz
- 22. Using Hot Deployment Create a marker file with name hot_deploy in .openshift/ markers directory Commit and push it to application gear © Xebia IT Architects Pvt Ltd. 2014. Confidential: Not for Reproduction & Distribution. www.xebia.in
- 23. Using Continuous Integration Server 1. You can use OpenShift Jenkins cartridge to add CI to your application 2. OpenShift uses Jenkins in master slave topology 3. You can increase builder timeout 4. Creating a Jenkins workflow 5. Using external Jenkins with OpenShift deployer plugin © Xebia IT Architects Pvt Ltd. 2014. Confidential: Not for Reproduction & Distribution. www.xebia.in
- 24. Nonscalable to Scalable application Create a new application $ rhc create-app scalableapp –from-app nonscalableapp –scaling Look at haproxy.cfg Using different balance algorithm Disable auto scaling and then using manual scaling to trigger scaling events depending on your requirements © Xebia IT Architects Pvt Ltd. 2014. Confidential: Not for Reproduction & Distribution. www.xebia.in
- 25. Thanks © Xebia IT Architects Pvt Ltd. 2014. Confidential: Not for Reproduction & Distribution. www.xebia.in